Controlling The Laser Scanner Motor; Controlling The Laser Shutter - Canon iR C3200 Series Service Manual

Chapter 8

8.3.3 Controlling the Laser Scanner Motor

8.3.3.1 Controlling the Laser Scanner Motor

The machine uses the acceleration/deceleration signal to control the speed of rotation of the laser scanner motor so
that the BD signal from individual laser units will be of the same phase as the reference signal (if the BD signal is
behind the reference signal, accelerate; if ahead, decelerates).

8.3.4 Controlling the Laser Shutter

8.3.4.1 Controlling the Laser Shutter

The laser light is turned off whenever a cover (indicated) that can let laser light to escape is opened:
- front cover
- manual feed unit
- fixing feeder unit
If any of the covers (units) is opened, the operation voltage applied to the latest driver is turned off and, in addition,
the laser control signal/image signal is also turned off.
8-10
Deceleration signal
Acceleration signal
J117 J115
IC for
control
Reference
signal
DC controller PCB
F-8-11
BD signal
0000-4462
0000-4463